Consider a production line with five stations. Station $1$ can produce a unit in $9$ minutes. Station $2$ can produce a unit in $10$ minutes. Station $3$ has two identical machines, each of which can process a unit in $12$ minutes $($each unit only needs to be processed on one of the two machines$).$ Station $4$ can produce a unit in $11$ minutes. Station $5$ can produce a unit in $8$ minutes. Which station is the bottleneck station?

lag question

OA$.$ Station $4$

OB$.$ Station $5$

OC$.$ Station $1$

OD$.$ Station $3$

E$.$ Station $2$